-56.11% is the change from 647 to 284
Calculation steps:
[( 284 - 647 ) ÷ 647] x 100 = -56.11%
Formula
Percentage change = [(284 - 647) / 647] x 100
Subtract the new number by the original number
284 - 647 = -363
-363 ÷ 647 = -0.5610510046367851
-0.5610510046367851 x 100 = -56.11%